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{ throw new NotImplementedException(); } private void Button_Click(object sender, RoutedEventArgs e) { txtXAMLEventText.Text = "Thank you for clicking!"; } } } 5. Now the only thing left to do is add the code to the event handler. You will notice that, by default, Visual Studio added code to automatically throw a NotImplementedException. Remove that line and replace it with the following line to change the TextBlock control s text.

Data binding simplifies application development. Since changes are reflected automatically, you do not need to manually update the UI elements. Also, by using data binding, you are able to separate the UI from the data in your application, which allows for a cleaner UI and easier maintenance.

Interactivity is what puts the pivot in PivotTable reports. You can rearrange the report by moving fields between the Row, Column, and Page areas. Figure 3-17 shows the PivotTable report from Figure 3-14 after the Region field has been dragged from the Row Area to the Column Area.

void btnManaged_Click(object sender, RoutedEventArgs e) { txtManagedEventText.Text = "Thank you for clicking"; } 6. Run the application and click the Managed Event button. You will see the text for the second TextBlock is updated to say Thank you for clicking, as shown in Figure 4-7.

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Data binding in Silverlight 2 is accomplished by using the Binding class. The Binding class has two components the source and target and a property that defines the way the two are bound, called the binding mode. The source is the data that is to be bound, the target is a property of the control that the data is to be bound to, and the mode defines how the data is passed between the source and the target (one-way, one-time, or two-way). You ll see how this works in the upcoming exercise. To define the binding of a control s property, you use XAML markup extensions, such as {Binding <path>}. For example, to bind the Text property of a TextBox to a data source s FirstName element, you would use the following XAML:

Note If you re relatively new to PivotTables, you can find more information on creating and manipulating

This exercise demonstrated how to wire up an event handler using C# and managed code. In the remainder of the chapter, we will take a tour of the more commonly used form controls in Silverlight 2. Let s start off by looking at the Border control.

To help explain data binding in Silverlight, let s build a very simple application. The application will include a Book object that contains two properties: Title and ISBN. These properties will be bound to two TextBox controls. Figure 5-2 shows the end result of the example.

PivotTable reports in Excel. Choose Help Microsoft Excel Help, then enter pivot in the search box. For a quick overview, the Microsoft web site includes a fine demo:

The Border control provides a way to add a border and background to any one control in Silverlight. Even though a border is applied to only one control, you can always place a border around a StackPanel or Grid, and as a result include many controls within a border. The syntax to add a Border control to your Silverlight project is very simple, as you can see from the following example: <UserControl x:Class="Ch4_BorderControl.Page" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" Width="400" Height="300"> <Grid x:Name="LayoutRoot" Background="White"> <Border BorderThickness="2" BorderBrush="Black" Margin="10"> <StackPanel Margin="10"> <Button Content="Sample Button" Margin="5" /> <TextBlock Text="Sample TextBlock" Margin="5" /> <ListBox Margin="5"> <ListBoxItem> <TextBlock Text="ListItem 1" /> </ListBoxItem> <ListBoxItem> <TextBlock Text="ListItem 2" /> </ListBoxItem> <ListBoxItem> <TextBlock Text="ListItem 3" /> </ListBoxItem> <ListBoxItem> <TextBlock Text="ListItem 4" /> </ListBoxItem> </ListBox> </StackPanel> </Border> </Grid> </UserControl> Figure 4-8 shows the results.

1. Create a new Silverlight application in Visual Studio 2008. Name the project BasicDataBinding, and allow Visual Studio to create a Web Site project to host

It offers a training module as well: